/*
 * ============================================================================
 *                   GNU Lesser General Public License
 * ============================================================================
 *
 *
 *
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
 *
 *
 *
 */
package rad.framework.seam;

import java.io.Serializable;

import org.jboss.seam.core.Events;

/**
 * @author boudyacho
 */
public class OrderBy implements Serializable {

	// TODO unit test
	public static final String EVENT = "OrderBy.orderChanged";
	
	protected String order = null;

	// TODO store in filter eventually
	protected boolean descending = false;

	public String reorder(String orderBy) {
		if (orderBy.equals(order)) {
			descending = !descending;
		} else {
			descending = false;
		}
		order = orderBy;

		Events.instance().raiseEvent(EVENT);
		return null;
	}

	public boolean isDescending() {
		return descending;
	}

	public String toString() {
		if (order != null) {
			if (descending) {
				return order + " desc";
			} else {
				return order;
			}
		} else {
			// TODO store in filter eventually
			return "id";
		}
	}

	public void initOrderBy(String name, boolean descending) {
		this.order = name;
		this.descending = descending;
	}
}
